Cut-off valve.



No. 687,409; Patented Nov'. 26, I90l. F. SEIFFERT.

CUT-OFF VALVE.

(Applicatiun filed Apr. 25, 1901.) (No Model.) 2 Sheets-Sheet l.

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No. 687,409. Patented Nov. 26, mm. F. SEIFFERT'.

CUT-OFF VALVE.

.fApplication'filed Apr. 25. 1901.)

2 Sheets-Sheet 2.

(No Model.)

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. Eve 31 202." Z Z'Zngmrew Tran ,J'evfferi' ifiotnej m: Noam Papas col.PHoTo-umo WAMINGTON a c parts by a vertical cross-wall b. On both sidesThe slides o and (Z are big enough to always UNITED STATES v FRANZSEIFFER'I, OF BERLIN, GERMANY.

OUT-OFF VALVE.

SEECIFICATION forming part of Letters Patent No. 687,409,datedll'ovember 26, 1901.

Serial No. 57,485. (No model.)

To aZZ whom it may concern: 7

Be it known that I, FRANZ SEIFFERT, asubject of the Kingof Prussia,German Emperor, and a resident of 154. Koepenickerstrasse, Berlin,Kingdom of Prussia, German Empire, have invented certain new and usefulImprovements in Out-01f Valves,of which the following is an exactspecification.

My invention relates to improvements in cut-off valves for steam, air,water, and the like pipes.

The object of my invention is to avoid the spindle for moving thevalve-slide having to be tightened'by means of a stuffing-box or thelike. I attain this object by the construction illustrated in theaccompanying drawings, in which similar letters denote similar partsthroughout the different views, and in Which- Figure 1 is a verticalsection of the valve. Fig. 2 is a vertical section at right angles tothat shown in Fig.1. Fig. 3 is partly an upper view and-partly ahorizontal section of the valve. Fig. 4 is a side view of a modificationof the construction shown in Figs. 1' to 3. Fig. 5 is a vertical-sectionof this modification. Fig. 6 is a horizontal section of the same.

In the construction shown in Figs. 1 to 3, a. is the valve-case, whichis divided in two of this cross-wall slides c and d are situated. Theseslides c and d are provided with noses c and cl, by means of which theyare fixed to the square 6 of the spindle f. This spindle f can be movedby means of the hand-wheel g. The cross-wall Z2 is in its lower partprovided with several perforations or slots h, which perforationscorrespond with perforations 1i and k of the slides c and d. In theupper part of the cross-wall a slot Z is provided for taking up thenoses c and d of the slides. The spindle f is guided in the cross-wallI).

cover the slot Z of the crosswall-that is to say, to cover this slotas'well in the position in which the perforations or slots h are open asin the position in which they are closedso that the steam, water, or thelike contained in the valve cannot escape through the bore for thespindle f. The necessity of a stuffingbox for tightening the spindle istherefore perfectly avoided.

The modification shown in Figs. 4 to 6 differs from the constructionshown in Figs. 1 to 3 by the slides c and d not being moved up and down.In this construction turning slides c and d are provided, which turnaround the fulcrum m, provided on the cross-wall b. The turning of theslides is eifected by means of the hand-wheel g, fixed to the spindle f.This spindle is provided with threads on its lower end, which issituated in a slot n of the cross-wall Z). In this slot a sliding nut 0is provided, which is shifted up and down by turning the spindlef. Toboth sides of the sliding nut 0 pins or noses p are fixed, as shown inFig. 6, which pins are situated in grooves q, provided on the inside ofthe slides c and cl, so that by moving the slide-nut 0 the slides c and(Z, which must follow the movement of the nut on account of the pins 1)engaging in the recesses or grooves q, are turned. Now as the slides aand (i cannot follow the upward and downward motion of the nut theseslides will be turned around their fulcrums m. Now the cross-wall b, aswell as the slides c and d, is provided with perforations or slots, asin the construction described above. The slots are advantageouslyarranged radially. Also in this construction the slides are constructedso that the slot or for taking up the sliding nut 0 is always closed bythe slides, so that the steam or water contained in the valve cannotescape through the bore for the spindle f.

It will be understood that the constructions described can be modifiedby providing only one slide, which must be situated on that side of thecross-wall on which the water, steam, or the like enters, in order tohave this slide pressed against the cross-wall by means of the water,steam or the like. It would also be possible to arrange two crosswallsand only one slide sliding between the same.

Having thus fully described the nature of this invention, what'I desireto secure by Letters Patent of the United States is- 1. In cut-offvalves, the combination of a valve-case, a cross-wall for dividing thevalvecasein two separate divisions, said cross-wall being provided withperforations, a valvethose of the cross-wall, a spindle for moving bothvalve-slides, means for transmitting the movement of the spindle to theslides, said means being situated in slots provided in the cross-wall,so as to be always covered by both valve-slides, as and for the purposeset forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRANZ SEIFFERT.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER.

